Leandri M, Brunetti O, Parodi C I
Phys Ther. 1986 Feb;66(2):210-3. doi: 10.1093/ptj/66.2.210.
The purpose of this study was to determine whether some types of transcutaneous electrical nerve stimulation cause local vasodilation. The amount of vascular perfusion was monitored using telethermography to gauge the skin temperature of the area to which TENS was applied. We studied the effects of four different modalities of TENS (intensities of 1.5 and 3 times the sensory threshold and frequencies of 3 pulses per second [pps] and 100 pps), delivered through small and large electrodes (1.5 cm and 4 cm in diameter), on 10 healthy subjects. Stimulation at 3 times the sensory threshold produced local hyperthermia, which was maximal when a current of 100 pps was delivered through small electrodes. Because any physical or chemical effects of the current could be eliminated as causes of hyperthermia, the rise in skin temperature was considered to be a result of increased vascular perfusion. The results of the study demonstrate that some types of TENS cause local vasodilation. This effect may represent another mechanism by which such techniques provide pain relief, particularly in the treatment of myofascial syndromes.
本研究的目的是确定某些类型的经皮电刺激神经疗法（TENS）是否会引起局部血管舒张。使用远红外热成像技术监测血管灌注量，以测量施加TENS区域的皮肤温度。我们研究了四种不同模式的TENS（感觉阈值的1.5倍和3倍强度，以及每秒3次脉冲[pps]和100 pps的频率），通过大小不同的电极（直径分别为1.5厘米和4厘米），对10名健康受试者的影响。感觉阈值3倍强度的刺激产生了局部体温过高，当通过小电极施加100 pps的电流时，这种情况最为明显。由于电流的任何物理或化学效应都可被排除作为体温过高的原因，皮肤温度的升高被认为是血管灌注增加的结果。研究结果表明，某些类型的TENS会引起局部血管舒张。这种效应可能代表了此类技术缓解疼痛的另一种机制，尤其是在治疗肌筋膜综合征方面。
